Animal Fibre - Silk

An example of animal fibre is

Animals fibres are __________ and ___________ .

Animal fibres are mainly

Introduction|Wool|Wool Yielding Animals|From Fibre To Wool|OMR

Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. Which of the following would be the right gift for her to buy?

Which of the following is an animal fibre ?